of titusville



tant @anni artesian wells, where a continuous rod, from six hundred to eight hundred feet inlength, is required.

Arequired length, or to repair or renew broken ones,

gendl is somewhat larger, las shown.

H. T. HUNT, OF TITUSV-ILLE, PENNSYLVANIA.

- Letters PatcntNo.'87,778, dated Mel/rch 16,1869. I

UPROVEIENT IN PUTE-ROD COUPLING.

m Schedule referred to in these-Letters Patent and making part' of tha Ilma.

I'o all wlwmit ma/y concern.-

Be it known that I, H. T. HUNT, of the city of Titus# ville, county of Crawford, and State of Pennsylvania, have invented a certain new and improved Coupling for Pump-Rods; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, which form a part of this specification, and in which4 Figure-lis a vertical or longitudinal section of the coupling;

Figure 2 is a transverse section, on line A B;

. Figure', a transverse section, on line C D; and

Figure 4, a longitudinal section of the expander, on lineEFofiig. 3.

Myinvention is especially adapted for the coupling or joining together of the wooden pump-rods used in Sad rods, are subjected to severe tensile strain in both directions; and as a large number of couplings are required, they should not only be rigid and durable, butv cheap and simple in construction, so that Welloperators, who are not usually skilled mechanics, may be able at any time `to cnt and splice the rods to any and at the same time to keep the rods and joints in perfect alignment. It is also applicable to all other joints of a similar nature.

In the drawingsa represents the end of the wooden rod. b is an annular metal ferrule, of a tapering form, the inner end tting closely to the rod a, while the outer c lis a double wedge, or expander, made of metal, ang of the peculiar sectional form shown in iigs. 2, 3, an 4.

'The end of the roda being first sawed or slittecl, to receive the point of theexpander, the tapering ferrule b is slipped over it, and the expander cis driven firmly into 4the end of the wooden rod, thus expanding the same to the full size 'of the ferrule throughout its length. l

A female thread is cut upon the outer end of the ferrule, and the rods are connected rigidly together by -means of a nipple, d, provided with a square or hexagonal collar in the centre, and a male-screw thread upon each end, corresponding with the thread upon the ferrule, all as, shown.

' The expander c is made'of such cross-sectional form as to split the end of the rod, within the ferrule. into equal parts.

The outer edges of the expander taper to correspond with the taper of the ferrule, while both the central portion and the wings of the same also taper longitudinally.

The result is, that when it isdriven firmly within the ferrule, the entire outer surface of the rod is pressed radially against and completely fills the ferrule, thus making a connection firm and rigid in every direction,

andpreserving a perfect alignment of the rods and joints. 4

. This latter feature is of vital importance to the smooth Working and durability of the rods, and is not attained by the various joints in common use, except by a much greater expenditure of time and labor than the consumers are Willing to pay for.

I am aware that the use of a single at wedge, for securing ferrules .upon tool-handles, &c.,is-a common practice; but when used in securing said pump-rods;

the practical diiiiculty is that it only expands the wood in' one direction, and the joint soon becomes loose, and the alignment is destroyed. u i

The essential feature of my invention is, that by the -use ofthe device represented, the joint is perfectly rigid against both tensile and transverse strains, while the perfect alignment of the rods and joints is pre 

